Keystones — Lintel
Five GCSE retrieval questions · 3 March 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0016
Answer: 1.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 52°. Find opposite
Answer: 30.7cm -
4. Ratio Mixed ratio problems
Simplify: 18:12:9
Answer: 6:4:3 -
5. Statistics Mean
Calculate the mean of: 22, 25, 11, 47, 8, 17, 42
Answer: 24.6